<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>1_字符串形式的ref</title>
</head>
<body>
  <!-- 准备好一个"容器" -->
  <div id="test1"></div>

  <!-- 引入React核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>
  <!-- 引入prop-types，用于对组件标签属性进行限制 -->
  <script type="text/javascript" src="../js/prop-types.js"></script>

  <script type="text/babel">
    // 1.创建组件
    class Demo extends React.Component {
      // 展示左侧输入框的数据
      showData = () => {
        const {input1} = this.refs
        alert(input1.value)
      }

      // 展示右侧输入框的数据
      showData2 = () => {
        const {input2} = this.refs
        alert(input2.value)
      }

      render() {
        return (
          <div>
            <input ref="input1" type="text" placeholder="点击按钮提示数据"/>&nbsp;
            <button ref="button100" onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
            <input ref="input2" onBlur={this.showData2} type="text" placeholder="失去焦点提示数据"/>
          </div>
        )
      }
    }

    // 2.渲染组件到页面
    ReactDOM.render(<Demo />, document.getElementById('test1'))
  </script>
</body>
</html>
